$ git clone -n https://src.fedoraproject.org/rpms/rust-chrono-english.git /var/lib/mock/f45-build-40751-775/root/chroot_tmpdir/scmroot/rust-chrono-english
Cloning into '/var/lib/mock/f45-build-40751-775/root/chroot_tmpdir/scmroot/rust-chrono-english'...
$ git fetch origin 8b9d75462df6b6a373c0515be643a82698505d2f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-chrono-english
 * [new ref]         8b9d75462df6b6a373c0515be643a82698505d2f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8b9d754 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild