$ git clone -n https://src.fedoraproject.org/rpms/rust-afterburn.git /var/lib/mock/f41-build-855814-167429/root/chroot_tmpdir/scmroot/rust-afterburn
Cloning into '/var/lib/mock/f41-build-855814-167429/root/chroot_tmpdir/scmroot/rust-afterburn'...
$ git fetch origin e5aec69de2f5d806cf00c7273c5464bf1367a14c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-afterburn
 * [new ref]         e5aec69de2f5d806cf00c7273c5464bf1367a14c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e5aec69 Update to 5.7.0