$ git clone -n https://src.fedoraproject.org/rpms/rust-lv2-units.git /var/lib/mock/f38-build-side-43-rust-devel-1401381-31168/root/chroot_tmpdir/scmroot/rust-lv2-units
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1401381-31168/root/chroot_tmpdir/scmroot/rust-lv2-units'...
$ git fetch origin 1acae3110f74bd84720cb128d4c2c4bbdd1f460e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-lv2-units
 * [new ref]         1acae3110f74bd84720cb128d4c2c4bbdd1f460e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1acae31 Initial import; Fixes: RHBZ#2224763