$ git clone -n https://src.fedoraproject.org/rpms/Coin4.git /var/lib/mock/f40-build-2195971-51545/root/chroot_tmpdir/scmroot/Coin4
Cloning into '/var/lib/mock/f40-build-2195971-51545/root/chroot_tmpdir/scmroot/Coin4'...
$ git fetch origin a442eb074cc703e4b3562c65d8d952b21d73b6ee:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/Coin4
 * [new ref]         a442eb074cc703e4b3562c65d8d952b21d73b6ee -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a442eb0 Upload source.