$ git clone -n https://src.fedoraproject.org/rpms/libicu76.git /var/lib/mock/f45-build-16445-486/root/chroot_tmpdir/scmroot/libicu76
Cloning into '/var/lib/mock/f45-build-16445-486/root/chroot_tmpdir/scmroot/libicu76'...
$ git fetch origin d5ca94fc06e13bb43f59dd35a79c6811287e2835:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libicu76
 * [new ref]         d5ca94fc06e13bb43f59dd35a79c6811287e2835 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d5ca94f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild