$ git clone -n https://src.fedoraproject.org/rpms/perl.git /var/lib/mock/f45-build-45312-822/root/chroot_tmpdir/scmroot/perl
Cloning into '/var/lib/mock/f45-build-45312-822/root/chroot_tmpdir/scmroot/perl'...
$ git fetch origin 81a462d69e2236a8506ad17a71424d49011321e8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl
 * [new ref]         81a462d69e2236a8506ad17a71424d49011321e8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 81a462d 5.42.1 bump