$ git clone -n https://src.fedoraproject.org/rpms/php-psr-http-message.git /var/lib/mock/f45-build-28269-629/root/chroot_tmpdir/scmroot/php-psr-http-message
Cloning into '/var/lib/mock/f45-build-28269-629/root/chroot_tmpdir/scmroot/php-psr-http-message'...
$ git fetch origin 0da7d1d012fddf14e5e203ba0f18807ef21d517a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/php-psr-http-message
 * [new ref]         0da7d1d012fddf14e5e203ba0f18807ef21d517a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0da7d1d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild