$ git clone -n https://src.fedoraproject.org/rpms/aw-server-rust.git /var/lib/mock/f42-build-side-1-3568040-46743/root/chroot_tmpdir/scmroot/aw-server-rust
Cloning into '/var/lib/mock/f42-build-side-1-3568040-46743/root/chroot_tmpdir/scmroot/aw-server-rust'...
$ git fetch origin 3842a1b42424c605a51a80887527bd2662845116:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/aw-server-rust
 * [new ref]         3842a1b42424c605a51a80887527bd2662845116 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3842a1b Update to c640979