$ git clone -n https://src.fedoraproject.org/rpms/golang-github-guregu-null.git /var/lib/mock/f38-build-side-42-init-devel-998079-29140/root/chroot_tmpdir/scmroot/golang-github-guregu-null
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-998079-29140/root/chroot_tmpdir/scmroot/golang-github-guregu-null'...
$ git fetch origin 607dea903fd98c582c16c242e1e523d1c4dcb759:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-guregu-null
 * [new ref]         607dea903fd98c582c16c242e1e523d1c4dcb759 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 607dea9 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild