$ git clone -n https://src.fedoraproject.org/rpms/rust-lv2.git /var/lib/mock/f38-build-side-42-init-devel-1163683-30586/root/chroot_tmpdir/scmroot/rust-lv2
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1163683-30586/root/chroot_tmpdir/scmroot/rust-lv2'...
$ git fetch origin 3d18f6b7a7a70db13a2b1fb30b2c3493a8dfdbe8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-lv2
 * [new ref]         3d18f6b7a7a70db13a2b1fb30b2c3493a8dfdbe8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3d18f6b Initial import; Fixes: RHBZ#2224770