$ git clone -n https://src.fedoraproject.org/rpms/rust-startup-disk.git /var/lib/mock/f41-build-811116-147145/root/chroot_tmpdir/scmroot/rust-startup-disk
Cloning into '/var/lib/mock/f41-build-811116-147145/root/chroot_tmpdir/scmroot/rust-startup-disk'...
$ git fetch origin afb292cc629749c57bf0a92b42e494a8df3a7190:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-startup-disk
 * [new ref]         afb292cc629749c57bf0a92b42e494a8df3a7190 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at afb292c Update to 0.1.4