$ git clone -n https://src.fedoraproject.org/rpms/qt5-qtdeclarative.git /var/lib/mock/f41-build-847161-163780/root/chroot_tmpdir/scmroot/qt5-qtdeclarative
Cloning into '/var/lib/mock/f41-build-847161-163780/root/chroot_tmpdir/scmroot/qt5-qtdeclarative'...
$ git fetch origin c41431e7b3f10f5d8bb43f5d07d6ea5c3ac5cfc4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt5-qtdeclarative
 * [new ref]         c41431e7b3f10f5d8bb43f5d07d6ea5c3ac5cfc4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c41431e 5.15.15