$ git clone -n https://src.fedoraproject.org/rpms/perl-forks.git /var/lib/mock/f45-build-27653-625/root/chroot_tmpdir/scmroot/perl-forks
Cloning into '/var/lib/mock/f45-build-27653-625/root/chroot_tmpdir/scmroot/perl-forks'...
$ git fetch origin 47e76b2371d014a055c4537027e66bf02e7f5268:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-forks
 * [new ref]         47e76b2371d014a055c4537027e66bf02e7f5268 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 47e76b2 Perl 5.44 rebuild