$ git clone -n https://src.fedoraproject.org/rpms/qt5-qtdeclarative.git /var/lib/mock/f42-build-side-1-3539466-46565/root/chroot_tmpdir/scmroot/qt5-qtdeclarative
Cloning into '/var/lib/mock/f42-build-side-1-3539466-46565/root/chroot_tmpdir/scmroot/qt5-qtdeclarative'...
$ git fetch origin 4bb26343d5f79f6223462bd33fc771bc9417efde:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt5-qtdeclarative
 * [new ref]         4bb26343d5f79f6223462bd33fc771bc9417efde -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4bb2634 5.15.17