$ git clone -n https://src.fedoraproject.org/rpms/js8call.git /var/lib/mock/f39-build-1579908-38046/root/chroot_tmpdir/scmroot/js8call
Cloning into '/var/lib/mock/f39-build-1579908-38046/root/chroot_tmpdir/scmroot/js8call'...
$ git fetch origin 2a125a3ee88c389106b88defe74f7f9d3d8df99b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/js8call
 * [new ref]         2a125a3ee88c389106b88defe74f7f9d3d8df99b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2a125a3 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild