$ git clone -n https://src.fedoraproject.org/rpms/centpkg.git /var/lib/mock/f41-build-side-1-3049275-37876/root/chroot_tmpdir/scmroot/centpkg
Cloning into '/var/lib/mock/f41-build-side-1-3049275-37876/root/chroot_tmpdir/scmroot/centpkg'...
$ git fetch origin 7f7b5bb69bbc2024e7016cd1546a3121aa304730:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/centpkg
 * [new ref]         7f7b5bb69bbc2024e7016cd1546a3121aa304730 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7f7b5bb Update to 0.8.13