$ git clone -n https://src.fedoraproject.org/rpms/mingw-qt5-qtserialport.git /var/lib/mock/f45-build-18784-529/root/chroot_tmpdir/scmroot/mingw-qt5-qtserialport
Cloning into '/var/lib/mock/f45-build-18784-529/root/chroot_tmpdir/scmroot/mingw-qt5-qtserialport'...
$ git fetch origin c974ea794acb0591f0d3edaf3b780c01557bb48a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mingw-qt5-qtserialport
 * [new ref]         c974ea794acb0591f0d3edaf3b780c01557bb48a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c974ea7 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild