$ git clone -n https://src.fedoraproject.org/rpms/rust-primeorder.git /var/lib/mock/f38-build-side-43-rust-devel-1411717-31436/root/chroot_tmpdir/scmroot/rust-primeorder
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1411717-31436/root/chroot_tmpdir/scmroot/rust-primeorder'...
$ git fetch origin 3b4a5b00e142b70b8df562bcf2f23100fc7b222a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-primeorder
 * [new ref]         3b4a5b00e142b70b8df562bcf2f23100fc7b222a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3b4a5b0 Initial import (#2213266)