$ git clone -n https://src.fedoraproject.org/rpms/rust-dbl.git /var/lib/mock/f38-build-side-43-rust-devel-1419001-31459/root/chroot_tmpdir/scmroot/rust-dbl
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1419001-31459/root/chroot_tmpdir/scmroot/rust-dbl'...
$ git fetch origin 838bb8ad800429ac557bbe8d684320c6f4c451d4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-dbl
 * [new ref]         838bb8ad800429ac557bbe8d684320c6f4c451d4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 838bb8a Initial import (#2214354)