$ git clone -n https://src.fedoraproject.org/rpms/qt5-qtserialport.git /var/lib/mock/f38-build-711674-94096/root/chroot_tmpdir/scmroot/qt5-qtserialport
Cloning into '/var/lib/mock/f38-build-711674-94096/root/chroot_tmpdir/scmroot/qt5-qtserialport'...
$ git fetch origin 1e5d61fb57768c9b7db86ce4d10a08fe68986520:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt5-qtserialport
 * [new ref]         1e5d61fb57768c9b7db86ce4d10a08fe68986520 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1e5d61f 5.15.9