$ git clone -n https://src.fedoraproject.org/rpms/qt5-qtdeclarative.git /var/lib/mock/f40-build-772744-126620/root/chroot_tmpdir/scmroot/qt5-qtdeclarative
Cloning into '/var/lib/mock/f40-build-772744-126620/root/chroot_tmpdir/scmroot/qt5-qtdeclarative'...
$ git fetch origin 9da807d551f2b5f5fe6c179ce1703114d5730a66:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt5-qtdeclarative
 * [new ref]         9da807d551f2b5f5fe6c179ce1703114d5730a66 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9da807d 5.15.12