$ git clone -n https://src.fedoraproject.org/rpms/python-flask-principal.git /var/lib/mock/f39-build-1606004-38607/root/chroot_tmpdir/scmroot/python-flask-principal
Cloning into '/var/lib/mock/f39-build-1606004-38607/root/chroot_tmpdir/scmroot/python-flask-principal'...
$ git fetch origin caf42be049aa3e465562ba7f9762f063dc23b334:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-flask-principal
 * [new ref]         caf42be049aa3e465562ba7f9762f063dc23b334 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at caf42be Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild