$ git clone -n https://src.fedoraproject.org/rpms/timeshift.git /var/lib/mock/f39-build-1531635-36214/root/chroot_tmpdir/scmroot/timeshift
Cloning into '/var/lib/mock/f39-build-1531635-36214/root/chroot_tmpdir/scmroot/timeshift'...
$ git fetch origin c6e12996a6692f127013dc04f5b9999fa1ce0c9e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/timeshift
 * [new ref]         c6e12996a6692f127013dc04f5b9999fa1ce0c9e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c6e1299 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild