$ git clone -n https://src.fedoraproject.org/rpms/libksysguard.git /var/lib/mock/f40-build-788906-135458/root/chroot_tmpdir/scmroot/libksysguard
Cloning into '/var/lib/mock/f40-build-788906-135458/root/chroot_tmpdir/scmroot/libksysguard'...
$ git fetch origin 38aa614b1a8255741b56f7179da39eef73ba1211:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libksysguard
 * [new ref]         38aa614b1a8255741b56f7179da39eef73ba1211 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 38aa614 6.0.0