$ git clone -n https://src.fedoraproject.org/rpms/rust-pwd.git /var/lib/mock/f45-build-44116-810/root/chroot_tmpdir/scmroot/rust-pwd
Cloning into '/var/lib/mock/f45-build-44116-810/root/chroot_tmpdir/scmroot/rust-pwd'...
$ git fetch origin 461e771d10dae4cae5eda4edfafcd7323a5a8cda:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-pwd
 * [new ref]         461e771d10dae4cae5eda4edfafcd7323a5a8cda -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 461e771 Regenerate with rust2rpm v28