$ git clone -n https://src.fedoraproject.org/rpms/rust-tracing-serde.git /var/lib/mock/f38-build-side-43-rust-devel-1411430-31436/root/chroot_tmpdir/scmroot/rust-tracing-serde
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1411430-31436/root/chroot_tmpdir/scmroot/rust-tracing-serde'...
$ git fetch origin ef69043887b6256e3a1ddefc229a5c82fbc4fa7f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tracing-serde
 * [new ref]         ef69043887b6256e3a1ddefc229a5c82fbc4fa7f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ef69043 Initial import (#2187791)