$ git clone -n https://src.fedoraproject.org/rpms/php-pecl-mongodb.git /var/lib/mock/f42-build-866146-173736/root/chroot_tmpdir/scmroot/php-pecl-mongodb
Cloning into '/var/lib/mock/f42-build-866146-173736/root/chroot_tmpdir/scmroot/php-pecl-mongodb'...
$ git fetch origin 170f0aebf713cafec5110e6705cdfc798b76bc66:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/php-pecl-mongodb
 * [new ref]         170f0aebf713cafec5110e6705cdfc798b76bc66 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 170f0ae v1.20.1