$ git clone -n https://src.fedoraproject.org/rpms/golang-github-mock.git /var/lib/mock/f40-build-2293978-56239/root/chroot_tmpdir/scmroot/golang-github-mock
Cloning into '/var/lib/mock/f40-build-2293978-56239/root/chroot_tmpdir/scmroot/golang-github-mock'...
$ git fetch origin 4e179a9cd8fa39bf38182d9a4c4867b1eb43b3d1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-mock
 * [new ref]         4e179a9cd8fa39bf38182d9a4c4867b1eb43b3d1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4e179a9 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild