$ git clone -n https://src.fedoraproject.org/rpms/xxkb.git /var/lib/mock/f39-build-1911660-42872/root/chroot_tmpdir/scmroot/xxkb
Cloning into '/var/lib/mock/f39-build-1911660-42872/root/chroot_tmpdir/scmroot/xxkb'...
$ git fetch origin 8f189ed5c97649b3b81aabf149e94b44c3782556:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xxkb
 * [new ref]         8f189ed5c97649b3b81aabf149e94b44c3782556 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8f189ed Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild