$ git clone -n https://src.fedoraproject.org/rpms/regionset.git /var/lib/mock/f45-build-34456-687/root/chroot_tmpdir/scmroot/regionset
Cloning into '/var/lib/mock/f45-build-34456-687/root/chroot_tmpdir/scmroot/regionset'...
$ git fetch origin 658ea4cbe5c7e1a15265bfaa29dc5e2c813305bb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/regionset
 * [new ref]         658ea4cbe5c7e1a15265bfaa29dc5e2c813305bb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 658ea4c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild