$ git clone -n https://src.fedoraproject.org/rpms/qt5-qtserialport.git /var/lib/mock/f39-build-2196557-51582/root/chroot_tmpdir/scmroot/qt5-qtserialport
Cloning into '/var/lib/mock/f39-build-2196557-51582/root/chroot_tmpdir/scmroot/qt5-qtserialport'...
$ git fetch origin 0227bab156c3d08de3f740c429ba128d31d2f391:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt5-qtserialport
 * [new ref]         0227bab156c3d08de3f740c429ba128d31d2f391 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0227bab 5.15.12