$ git clone -n https://src.fedoraproject.org/rpms/libphonenumber.git /var/lib/mock/f41-build-side-1-3132728-39664/root/chroot_tmpdir/scmroot/libphonenumber
Cloning into '/var/lib/mock/f41-build-side-1-3132728-39664/root/chroot_tmpdir/scmroot/libphonenumber'...
$ git fetch origin 2e946e6b619c38f824857bc80af67d55fcdca2c6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libphonenumber
 * [new ref]         2e946e6b619c38f824857bc80af67d55fcdca2c6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2e946e6 Update to 8.13.50 upstream release