$ git clone -n https://src.fedoraproject.org/rpms/pqmarble.git /var/lib/mock/f39-build-1586107-38178/root/chroot_tmpdir/scmroot/pqmarble
Cloning into '/var/lib/mock/f39-build-1586107-38178/root/chroot_tmpdir/scmroot/pqmarble'...
$ git fetch origin 9c780502c0d28e554f3499c0525a00de61d11f65:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pqmarble
 * [new ref]         9c780502c0d28e554f3499c0525a00de61d11f65 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9c78050 Initial package, resolves rhbz#2224161