$ git clone -n https://src.fedoraproject.org/rpms/rtklib.git /var/lib/mock/f45-build-34737-691/root/chroot_tmpdir/scmroot/rtklib
Cloning into '/var/lib/mock/f45-build-34737-691/root/chroot_tmpdir/scmroot/rtklib'...
$ git fetch origin c4772740356f0773871d90fb0a01cdf6320270b9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rtklib
 * [new ref]         c4772740356f0773871d90fb0a01cdf6320270b9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c477274 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild