$ git clone -n https://src.fedoraproject.org/rpms/perl-failures.git /var/lib/mock/f45-build-27639-625/root/chroot_tmpdir/scmroot/perl-failures
Cloning into '/var/lib/mock/f45-build-27639-625/root/chroot_tmpdir/scmroot/perl-failures'...
$ git fetch origin 13819314e3d5a19f204d964df97ea8b7dbac2729:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-failures
 * [new ref]         13819314e3d5a19f204d964df97ea8b7dbac2729 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1381931 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild