$ git clone -n https://src.fedoraproject.org/rpms/php-icewind-streams.git /var/lib/mock/f45-build-27916-626/root/chroot_tmpdir/scmroot/php-icewind-streams
Cloning into '/var/lib/mock/f45-build-27916-626/root/chroot_tmpdir/scmroot/php-icewind-streams'...
$ git fetch origin 3b9e50333f802b160c1b740250fc55f7a4df3a6c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/php-icewind-streams
 * [new ref]         3b9e50333f802b160c1b740250fc55f7a4df3a6c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3b9e503 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild