$ git clone -n https://src.fedoraproject.org/rpms/samtools.git /var/lib/mock/f45-build-35569-696/root/chroot_tmpdir/scmroot/samtools
Cloning into '/var/lib/mock/f45-build-35569-696/root/chroot_tmpdir/scmroot/samtools'...
$ git fetch origin 6994f637ef047105e7eeef3f37e57f32ce185e5c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/samtools
 * [new ref]         6994f637ef047105e7eeef3f37e57f32ce185e5c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6994f63 Added missing Perl requirement