$ git clone -n https://src.fedoraproject.org/rpms/rust-tracing-subscriber.git /var/lib/mock/f38-build-side-43-rust-devel-1411553-31436/root/chroot_tmpdir/scmroot/rust-tracing-subscriber
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1411553-31436/root/chroot_tmpdir/scmroot/rust-tracing-subscriber'...
$ git fetch origin 2c1dd162019c9cfd3b3708aee768c5ab133b515e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tracing-subscriber
 * [new ref]         2c1dd162019c9cfd3b3708aee768c5ab133b515e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2c1dd16 Initial import (#2187797)