$ git clone -n https://src.fedoraproject.org/rpms/rust-netlink-proto.git /var/lib/mock/f38-build-side-42-init-devel-1394260-31050/root/chroot_tmpdir/scmroot/rust-netlink-proto
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1394260-31050/root/chroot_tmpdir/scmroot/rust-netlink-proto'...
$ git fetch origin bb5d4bd6d90165b358c4ac60a16b3515a3c861a5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-netlink-proto
 * [new ref]         bb5d4bd6d90165b358c4ac60a16b3515a3c861a5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bb5d4bd Include source tarball