$ git clone -n https://src.fedoraproject.org/rpms/perl-User-Utmp.git /var/lib/mock/f45-build-27355-622/root/chroot_tmpdir/scmroot/perl-User-Utmp
Cloning into '/var/lib/mock/f45-build-27355-622/root/chroot_tmpdir/scmroot/perl-User-Utmp'...
$ git fetch origin a10d24a38fb58ba04398d54e1038b382e445d0f2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-User-Utmp
 * [new ref]         a10d24a38fb58ba04398d54e1038b382e445d0f2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a10d24a Perl 5.44 rebuild