$ git clone -n https://src.fedoraproject.org/rpms/rust-matchers.git /var/lib/mock/f38-build-side-43-rust-devel-1411416-31435/root/chroot_tmpdir/scmroot/rust-matchers
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1411416-31435/root/chroot_tmpdir/scmroot/rust-matchers'...
$ git fetch origin 7821805cb4c7dbe38a805e5699f80611dc772117:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-matchers
 * [new ref]         7821805cb4c7dbe38a805e5699f80611dc772117 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7821805 Initial import (#2187798)