$ git clone -n https://src.fedoraproject.org/rpms/golang-github-modern-concurrent.git /var/lib/mock/f40-build-2668412-67207/root/chroot_tmpdir/scmroot/golang-github-modern-concurrent
Cloning into '/var/lib/mock/f40-build-2668412-67207/root/chroot_tmpdir/scmroot/golang-github-modern-concurrent'...
$ git fetch origin ec1245b5df10627f9a9129de9976aa139b881683:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-modern-concurrent
 * [new ref]         ec1245b5df10627f9a9129de9976aa139b881683 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ec1245b Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild