$ git clone -n https://src.fedoraproject.org/rpms/mingw-qt6-qtserialport.git /var/lib/mock/f38-build-side-42-init-devel-733804-27628/root/chroot_tmpdir/scmroot/mingw-qt6-qtserialport
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-733804-27628/root/chroot_tmpdir/scmroot/mingw-qt6-qtserialport'...
$ git fetch origin d6108468cd267b1cd62bc84a8aecff681b3d1a74:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mingw-qt6-qtserialport
 * [new ref]         d6108468cd267b1cd62bc84a8aecff681b3d1a74 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d610846 BR: mingw-gcc-c++