$ git clone -n https://src.fedoraproject.org/rpms/rust-ethtool.git /var/lib/mock/f38-build-side-43-rust-devel-1397196-31052/root/chroot_tmpdir/scmroot/rust-ethtool
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1397196-31052/root/chroot_tmpdir/scmroot/rust-ethtool'...
$ git fetch origin 209d89c99656b3924fecf287f3fe02dc4d90e192:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-ethtool
 * [new ref]         209d89c99656b3924fecf287f3fe02dc4d90e192 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 209d89c Upgrade to 0.2.5