$ git clone -n https://src.fedoraproject.org/rpms/golang-github-lann-builder.git /var/lib/mock/f39-build-1507822-35309/root/chroot_tmpdir/scmroot/golang-github-lann-builder
Cloning into '/var/lib/mock/f39-build-1507822-35309/root/chroot_tmpdir/scmroot/golang-github-lann-builder'...
$ git fetch origin 4a67bbf17878fe12a8ebe8f043f99ac933ca431c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-lann-builder
 * [new ref]         4a67bbf17878fe12a8ebe8f043f99ac933ca431c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4a67bbf Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild