$ git clone -n https://src.fedoraproject.org/rpms/rust-chrono-tz-build.git /var/lib/mock/f45-build-40790-776/root/chroot_tmpdir/scmroot/rust-chrono-tz-build
Cloning into '/var/lib/mock/f45-build-40790-776/root/chroot_tmpdir/scmroot/rust-chrono-tz-build'...
$ git fetch origin 1668eb7cd1e2d120da496ee1be391af6cd0655ef:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-chrono-tz-build
 * [new ref]         1668eb7cd1e2d120da496ee1be391af6cd0655ef -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1668eb7 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild