$ git clone -n https://src.fedoraproject.org/rpms/libguestfs.git /var/lib/mock/f40-build-773956-127525/root/chroot_tmpdir/scmroot/libguestfs
Cloning into '/var/lib/mock/f40-build-773956-127525/root/chroot_tmpdir/scmroot/libguestfs'...
$ git reset --hard 3a2a7734bd3ab7e848d8e04cf26a7f5215d6c9aa
HEAD is now at 3a2a773 Make cache directory find more robust