$ git clone -n https://src.fedoraproject.org/rpms/rust-icu_calendar_data.git /var/lib/mock/f45-build-42478-794/root/chroot_tmpdir/scmroot/rust-icu_calendar_data
Cloning into '/var/lib/mock/f45-build-42478-794/root/chroot_tmpdir/scmroot/rust-icu_calendar_data'...
$ git fetch origin 9b7adf2517032240fd31fff149fed9947f6441fa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-icu_calendar_data
 * [new ref]         9b7adf2517032240fd31fff149fed9947f6441fa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9b7adf2 Update to version 2.3.0; Fixes RHBZ#2515879