checkout @{-N}: handle rebases #655

Job	Run time
config	5s
win+VS build	0s
linux32 (daald/ubuntu32:xenial)	7m 16s
linux-musl (alpine)	6m 40s
pedantic (fedora)	2m 1s
documentation	6m 18s
linux-asan-ubsan (ubuntu-latest)	33m 0s
linux-gcc (ubuntu-20.04)	7m 7s
linux-gcc-default (ubuntu-latest)	14m 42s
linux-leaks (ubuntu-latest)	10m 44s
linux-sha256 (ubuntu-latest)	10m 59s
linux-TEST-vars (ubuntu-20.04)	19m 56s
osx-clang (macos-13)	26m 16s
win+VS test	0s
sparse	2m 58s
static-analysis	3m 23s
win build	7m 19s
osx-gcc (macos-13)	33m 34s
win test (0)	13m 25s
win test (1)	4m 16s
win test (2)	7m 34s
win test (3)	10m 32s
win test (4)	7m 10s
win test (5)	5m 7s
win test (6)	6m 21s
win test (8)	6m 23s
win test (7)	3m 58s
win test (9)	4m 42s
	4h 21m 46s

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