$ git clone -n https://src.fedoraproject.org/rpms/golang-modernc-scannertest.git /var/lib/mock/f45-build-12735-443/root/chroot_tmpdir/scmroot/golang-modernc-scannertest
Cloning into '/var/lib/mock/f45-build-12735-443/root/chroot_tmpdir/scmroot/golang-modernc-scannertest'...
$ git fetch origin bb74b4f4fe5960a888c98d01541f0c488facbb80:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-modernc-scannertest
 * [new ref]         bb74b4f4fe5960a888c98d01541f0c488facbb80 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bb74b4f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild