$ git clone -n https://src.fedoraproject.org/rpms/libksysguard.git /var/lib/mock/f41-build-side-1-2894026-34620/root/chroot_tmpdir/scmroot/libksysguard
Cloning into '/var/lib/mock/f41-build-side-1-2894026-34620/root/chroot_tmpdir/scmroot/libksysguard'...
$ git fetch origin 21bd3c956bca076101a3c718211a0aa346c1a320:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libksysguard
 * [new ref]         21bd3c956bca076101a3c718211a0aa346c1a320 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 21bd3c9 6.2.0