$ git clone -n https://src.fedoraproject.org/rpms/rust-tracing-subscriber.git /var/lib/mock/f40-build-2093894-50340/root/chroot_tmpdir/scmroot/rust-tracing-subscriber
Cloning into '/var/lib/mock/f40-build-2093894-50340/root/chroot_tmpdir/scmroot/rust-tracing-subscriber'...
$ git fetch origin 4faf206670ab5d63b5409c9da8f571e84528b2a0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tracing-subscriber
 * [new ref]         4faf206670ab5d63b5409c9da8f571e84528b2a0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4faf206 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild