$ git clone -n https://src.fedoraproject.org/rpms/libphonenumber.git /var/lib/mock/f42-build-862692-171015/root/chroot_tmpdir/scmroot/libphonenumber
Cloning into '/var/lib/mock/f42-build-862692-171015/root/chroot_tmpdir/scmroot/libphonenumber'...
$ git fetch origin 286ad466206a96ce2443ce183720235512a4e4d3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libphonenumber
 * [new ref]         286ad466206a96ce2443ce183720235512a4e4d3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 286ad46 Rebuild for ICU 76