$ git clone -n https://src.fedoraproject.org/rpms/rust-cint.git /var/lib/mock/f45-build-40805-776/root/chroot_tmpdir/scmroot/rust-cint
Cloning into '/var/lib/mock/f45-build-40805-776/root/chroot_tmpdir/scmroot/rust-cint'...
$ git fetch origin b39439be8db7a023b8ea0f05518041cbbcd10118:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-cint
 * [new ref]         b39439be8db7a023b8ea0f05518041cbbcd10118 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b39439b Regenerate with rust2rpm v28