$ git clone -n https://src.fedoraproject.org/rpms/rust-stats_alloc.git /var/lib/mock/f45-build-45195-821/root/chroot_tmpdir/scmroot/rust-stats_alloc
Cloning into '/var/lib/mock/f45-build-45195-821/root/chroot_tmpdir/scmroot/rust-stats_alloc'...
$ git fetch origin c6c07e416d858f38d9405dd56d26b231ebbaebcf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-stats_alloc
 * [new ref]         c6c07e416d858f38d9405dd56d26b231ebbaebcf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c6c07e4 Regenerate with rust2rpm v28