$ git clone -n https://src.fedoraproject.org/rpms/rust-derive_utils.git /var/lib/mock/f41-build-side-1-3137252-39791/root/chroot_tmpdir/scmroot/rust-derive_utils
Cloning into '/var/lib/mock/f41-build-side-1-3137252-39791/root/chroot_tmpdir/scmroot/rust-derive_utils'...
$ git fetch origin 4717fa346b732175dd635306d25744bd34716c67:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-derive_utils
 * [new ref]         4717fa346b732175dd635306d25744bd34716c67 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4717fa3 import rhbz#2322417