$ git clone -n https://src.fedoraproject.org/rpms/darktable.git /var/lib/mock/f40-build-2433356-60699/root/chroot_tmpdir/scmroot/darktable
Cloning into '/var/lib/mock/f40-build-2433356-60699/root/chroot_tmpdir/scmroot/darktable'...
$ git fetch origin 03545f087ac638701c267619050788751114011e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/darktable
 * [new ref]         03545f087ac638701c267619050788751114011e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 03545f0 Rebuild for jpegxl (libjxl) 0.9.2 with soname bump