$ git clone -n https://src.fedoraproject.org/rpms/coolreader.git /var/lib/mock/f40-build-2240162-53632/root/chroot_tmpdir/scmroot/coolreader
Cloning into '/var/lib/mock/f40-build-2240162-53632/root/chroot_tmpdir/scmroot/coolreader'...
$ git fetch origin d4307a71ec303929fca3812610a8f8f51f1dac41:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/coolreader
 * [new ref]         d4307a71ec303929fca3812610a8f8f51f1dac41 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d4307a7 Fix Release: