$ git clone -n https://src.fedoraproject.org/rpms/plasma-milou.git /var/lib/mock/f41-build-824379-154063/root/chroot_tmpdir/scmroot/plasma-milou
Cloning into '/var/lib/mock/f41-build-824379-154063/root/chroot_tmpdir/scmroot/plasma-milou'...
$ git fetch origin 74b8dfd0b18385105dc23e348baf6c639e5e72ef:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-milou
 * [new ref]         74b8dfd0b18385105dc23e348baf6c639e5e72ef -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 74b8dfd rebuild