$ git clone -n https://src.fedoraproject.org/rpms/python-beaker.git /var/lib/mock/f39-build-1619804-38675/root/chroot_tmpdir/scmroot/python-beaker
Cloning into '/var/lib/mock/f39-build-1619804-38675/root/chroot_tmpdir/scmroot/python-beaker'...
$ git fetch origin fefbdc14c637f85852847b90c2e3a0a473f5eeed:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-beaker
 * [new ref]         fefbdc14c637f85852847b90c2e3a0a473f5eeed -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fefbdc1 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild