$ git clone -n https://src.fedoraproject.org/rpms/qt5-qtserialport.git /var/lib/mock/f41-build-811752-147521/root/chroot_tmpdir/scmroot/qt5-qtserialport
Cloning into '/var/lib/mock/f41-build-811752-147521/root/chroot_tmpdir/scmroot/qt5-qtserialport'...
$ git fetch origin 2741a201f4d7fae07848b5bd177551b2ffea44f7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt5-qtserialport
 * [new ref]         2741a201f4d7fae07848b5bd177551b2ffea44f7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2741a20 5.15.14