$ git clone -n https://src.fedoraproject.org/rpms/cryptlib.git /var/lib/mock/f40-build-740361-109656/root/chroot_tmpdir/scmroot/cryptlib
Cloning into '/var/lib/mock/f40-build-740361-109656/root/chroot_tmpdir/scmroot/cryptlib'...
$ git fetch origin 4402e1a9c303ae0139685e802f458c6d1cd8c65a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cryptlib
 * [new ref]         4402e1a9c303ae0139685e802f458c6d1cd8c65a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4402e1a update README-manual