$ git clone -n https://src.fedoraproject.org/rpms/plasma-print-manager.git /var/lib/mock/f42-build-side-1-3578414-46814/root/chroot_tmpdir/scmroot/plasma-print-manager
Cloning into '/var/lib/mock/f42-build-side-1-3578414-46814/root/chroot_tmpdir/scmroot/plasma-print-manager'...
$ git fetch origin 259d3c025f3da6c1b4077cebed04b4554b387889:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-print-manager
 * [new ref]         259d3c025f3da6c1b4077cebed04b4554b387889 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 259d3c0 6.4.1