$ git clone -n https://src.fedoraproject.org/rpms/jack-keyboard.git /var/lib/mock/f40-build-2004936-45014/root/chroot_tmpdir/scmroot/jack-keyboard
Cloning into '/var/lib/mock/f40-build-2004936-45014/root/chroot_tmpdir/scmroot/jack-keyboard'...
$ git fetch origin 63ed70cad28598bbd710cd9366e39ef9549a0203:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jack-keyboard
 * [new ref]         63ed70cad28598bbd710cd9366e39ef9549a0203 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 63ed70c Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild