$ git clone -n https://src.fedoraproject.org/rpms/localsearch.git /var/lib/mock/f42-build-side-1-3497627-45961/root/chroot_tmpdir/scmroot/localsearch
Cloning into '/var/lib/mock/f42-build-side-1-3497627-45961/root/chroot_tmpdir/scmroot/localsearch'...
$ git fetch origin 5f29800df071a6ac98217d4bf5561657c3f87874:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/localsearch
 * [new ref]         5f29800df071a6ac98217d4bf5561657c3f87874 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5f29800 Update to 3.9.0