$ git clone -n https://src.fedoraproject.org/rpms/rust-alacritty.git /var/lib/mock/f40-build-739174-108876/root/chroot_tmpdir/scmroot/rust-alacritty
Cloning into '/var/lib/mock/f40-build-739174-108876/root/chroot_tmpdir/scmroot/rust-alacritty'...
$ git fetch origin c2292155a1237cbb1a3fec2da1e166ca9af4f4cd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-alacritty
 * [new ref]         c2292155a1237cbb1a3fec2da1e166ca9af4f4cd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c229215 Update to 0.12.3 (rhbz#2241827)