$ git clone -n https://src.fedoraproject.org/rpms/sdsl-lite.git /var/lib/mock/f39-build-1662485-40667/root/chroot_tmpdir/scmroot/sdsl-lite
Cloning into '/var/lib/mock/f39-build-1662485-40667/root/chroot_tmpdir/scmroot/sdsl-lite'...
$ git fetch origin 49cf61936cee785292258364c85794d1b41fc9cc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sdsl-lite
 * [new ref]         49cf61936cee785292258364c85794d1b41fc9cc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 49cf619 Fix Descriptions