$ git clone -n https://src.fedoraproject.org/rpms/celestia.git /var/lib/mock/f40-build-1992426-43597/root/chroot_tmpdir/scmroot/celestia
Cloning into '/var/lib/mock/f40-build-1992426-43597/root/chroot_tmpdir/scmroot/celestia'...
$ git fetch origin f38fa9cb60f437b34c9d0fbc01dd909e680b3885:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/celestia
 * [new ref]         f38fa9cb60f437b34c9d0fbc01dd909e680b3885 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f38fa9c Rebuild (qt6)