$ git clone -n https://src.fedoraproject.org/rpms/rust-sptr.git /var/lib/mock/f45-build-45111-821/root/chroot_tmpdir/scmroot/rust-sptr
Cloning into '/var/lib/mock/f45-build-45111-821/root/chroot_tmpdir/scmroot/rust-sptr'...
$ git fetch origin 60b8e671ed4a235a3dcad5718862fd7bbd2c7be5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-sptr
 * [new ref]         60b8e671ed4a235a3dcad5718862fd7bbd2c7be5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 60b8e67 Regenerate with rust2rpm v28