$ git clone -n https://src.fedoraproject.org/rpms/rpkg-util.git /var/lib/mock/f45-build-34654-690/root/chroot_tmpdir/scmroot/rpkg-util
Cloning into '/var/lib/mock/f45-build-34654-690/root/chroot_tmpdir/scmroot/rpkg-util'...
$ git fetch origin 22ed5b187a64a23fbb67acea40026b5c781ada03:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rpkg-util
 * [new ref]         22ed5b187a64a23fbb67acea40026b5c781ada03 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 22ed5b1 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild