$ git clone -n https://src.fedoraproject.org/rpms/rust-strength_reduce.git /var/lib/mock/f45-build-45205-821/root/chroot_tmpdir/scmroot/rust-strength_reduce
Cloning into '/var/lib/mock/f45-build-45205-821/root/chroot_tmpdir/scmroot/rust-strength_reduce'...
$ git fetch origin 2a3e8988a57909680e1d900212e0ef18620089bf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-strength_reduce
 * [new ref]         2a3e8988a57909680e1d900212e0ef18620089bf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2a3e898 Regenerate with rust2rpm v28