$ git clone -n https://src.fedoraproject.org/rpms/sisu.git /var/lib/mock/f39-build-1855196-42401/root/chroot_tmpdir/scmroot/sisu
Cloning into '/var/lib/mock/f39-build-1855196-42401/root/chroot_tmpdir/scmroot/sisu'...
$ git fetch origin 901eac4309aa81f3bd1051ac18d755bd7c8c463c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sisu
 * [new ref]         901eac4309aa81f3bd1051ac18d755bd7c8c463c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 901eac4 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild