$ git clone -n https://src.fedoraproject.org/rpms/libksysguard.git /var/lib/mock/f42-build-862532-170850/root/chroot_tmpdir/scmroot/libksysguard
Cloning into '/var/lib/mock/f42-build-862532-170850/root/chroot_tmpdir/scmroot/libksysguard'...
$ git fetch origin 821910c2ddfc4379f05adc7687e9bfa84227cb56:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libksysguard
 * [new ref]         821910c2ddfc4379f05adc7687e9bfa84227cb56 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 821910c 6.2.4