$ git clone -n https://src.fedoraproject.org/rpms/jflex.git /var/lib/mock/f39-build-1567842-37601/root/chroot_tmpdir/scmroot/jflex
Cloning into '/var/lib/mock/f39-build-1567842-37601/root/chroot_tmpdir/scmroot/jflex'...
$ git fetch origin 94b8e90f6b8fa3b5e2b2768e3d9711664398cdfc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jflex
 * [new ref]         94b8e90f6b8fa3b5e2b2768e3d9711664398cdfc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 94b8e90 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild