$ git clone -n https://src.fedoraproject.org/rpms/golang-modernc-golex.git /var/lib/mock/f40-build-781929-131928/root/chroot_tmpdir/scmroot/golang-modernc-golex
Cloning into '/var/lib/mock/f40-build-781929-131928/root/chroot_tmpdir/scmroot/golang-modernc-golex'...
$ git fetch origin 42558b7a7e2ab78bc8f7c1ef753885f30710bb30:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-modernc-golex
 * [new ref]         42558b7a7e2ab78bc8f7c1ef753885f30710bb30 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 42558b7 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild