$ git clone -n https://src.fedoraproject.org/rpms/perl-Async-MergePoint.git /var/lib/mock/f45-build-21787-588/root/chroot_tmpdir/scmroot/perl-Async-MergePoint
Cloning into '/var/lib/mock/f45-build-21787-588/root/chroot_tmpdir/scmroot/perl-Async-MergePoint'...
$ git fetch origin b2bf04c41e82d863f4e1d5e786e230ca55f78464:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Async-MergePoint
 * [new ref]         b2bf04c41e82d863f4e1d5e786e230ca55f78464 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b2bf04c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild