$ git clone -n https://src.fedoraproject.org/rpms/xsetroot.git /var/lib/mock/f40-build-2234332-53398/root/chroot_tmpdir/scmroot/xsetroot
Cloning into '/var/lib/mock/f40-build-2234332-53398/root/chroot_tmpdir/scmroot/xsetroot'...
$ git fetch origin 6a30620a87f9a394df708e7e70539795dd2dbbb9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xsetroot
 * [new ref]         6a30620a87f9a394df708e7e70539795dd2dbbb9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6a30620 SPDX migration