$ git clone -n https://src.fedoraproject.org/rpms/qpdfview /var/lib/mock/f39-build-2346021-59975/root/chroot_tmpdir/scmroot/qpdfview
Cloning into '/var/lib/mock/f39-build-2346021-59975/root/chroot_tmpdir/scmroot/qpdfview'...
$ git fetch origin 5cce2218644f6411e6e37f0a11ff4ea620b67ee8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qpdfview
 * [new ref]         5cce2218644f6411e6e37f0a11ff4ea620b67ee8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5cce221 Rebuild (tesseract)