$ git clone -n https://src.fedoraproject.org/rpms/plasma-workspace.git /var/lib/mock/f38-build-728215-101103/root/chroot_tmpdir/scmroot/plasma-workspace
Cloning into '/var/lib/mock/f38-build-728215-101103/root/chroot_tmpdir/scmroot/plasma-workspace'...
$ git fetch origin 2a4bffa70711f40138e4c29e2951e7e70e32499d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-workspace
 * [new ref]         2a4bffa70711f40138e4c29e2951e7e70e32499d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2a4bffa 5.27.6