$ git clone -n https://src.fedoraproject.org/rpms/rust-partial-io.git /var/lib/mock/f45-build-43714-805/root/chroot_tmpdir/scmroot/rust-partial-io
Cloning into '/var/lib/mock/f45-build-43714-805/root/chroot_tmpdir/scmroot/rust-partial-io'...
$ git fetch origin fd70aa7a6b1edd9d706aea9c259335f5de2a95f1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-partial-io
 * [new ref]         fd70aa7a6b1edd9d706aea9c259335f5de2a95f1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fd70aa7 Regenerate with rust2rpm v28