$ git clone -n https://src.fedoraproject.org/rpms/golang-google-appengine.git /var/lib/mock/f38-build-709686-92954/root/chroot_tmpdir/scmroot/golang-google-appengine
Cloning into '/var/lib/mock/f38-build-709686-92954/root/chroot_tmpdir/scmroot/golang-google-appengine'...
$ git fetch origin bc72a7ccf088731eacf5aea20cb5d86aba8c4268:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-google-appengine
 * [new ref]         bc72a7ccf088731eacf5aea20cb5d86aba8c4268 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bc72a7c Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild