$ git clone -n https://src.fedoraproject.org/rpms/rust-multipart-rs.git /var/lib/mock/f41-build-side-1-3149612-40520/root/chroot_tmpdir/scmroot/rust-multipart-rs
Cloning into '/var/lib/mock/f41-build-side-1-3149612-40520/root/chroot_tmpdir/scmroot/rust-multipart-rs'...
$ git fetch origin 8cf1d0d2b380f0050c15489ee38ec38c19fccf03:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-multipart-rs
 * [new ref]         8cf1d0d2b380f0050c15489ee38ec38c19fccf03 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8cf1d0d Initial package; Resolves: RHBZ#2326634