$ git clone -n https://src.fedoraproject.org/rpms/rust-scrypt0.11.git /var/lib/mock/f45-build-44718-816/root/chroot_tmpdir/scmroot/rust-scrypt0.11
Cloning into '/var/lib/mock/f45-build-44718-816/root/chroot_tmpdir/scmroot/rust-scrypt0.11'...
$ git fetch origin bb9d49158f4d84a2147d86184699260222e207a5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-scrypt0.11
 * [new ref]         bb9d49158f4d84a2147d86184699260222e207a5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bb9d491 Initial compat package