$ git clone -n https://src.fedoraproject.org/rpms/rust-chrono-tz.git /var/lib/mock/f40-build-2189937-51418/root/chroot_tmpdir/scmroot/rust-chrono-tz
Cloning into '/var/lib/mock/f40-build-2189937-51418/root/chroot_tmpdir/scmroot/rust-chrono-tz'...
$ git fetch origin edf3391bec2ec0d1b5c5cd8b279fd6028eb92e74:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-chrono-tz
 * [new ref]         edf3391bec2ec0d1b5c5cd8b279fd6028eb92e74 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at edf3391 Update to version 0.8.5; Fixes RHBZ#2256168