$ git clone -n https://src.fedoraproject.org/rpms/qt5-qtserialbus.git /var/lib/mock/f39-build-1625162-39137/root/chroot_tmpdir/scmroot/qt5-qtserialbus
Cloning into '/var/lib/mock/f39-build-1625162-39137/root/chroot_tmpdir/scmroot/qt5-qtserialbus'...
$ git fetch origin 914c27f0e98b18b006fe339abdf3a1e7b14957af:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt5-qtserialbus
 * [new ref]         914c27f0e98b18b006fe339abdf3a1e7b14957af -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 914c27f 5.15.11