$ git clone -n https://src.fedoraproject.org/rpms/libksysguard.git /var/lib/mock/f42-build-880964-183040/root/chroot_tmpdir/scmroot/libksysguard
Cloning into '/var/lib/mock/f42-build-880964-183040/root/chroot_tmpdir/scmroot/libksysguard'...
$ git fetch origin 74f4fe847f047ceebd7fcbb27125459fee49214b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libksysguard
 * [new ref]         74f4fe847f047ceebd7fcbb27125459fee49214b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 74f4fe8 6.3.2