$ git clone -n https://src.fedoraproject.org/rpms/magicmirror.git /var/lib/mock/f38-build-side-42-init-devel-663343-26641/root/chroot_tmpdir/scmroot/magicmirror
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-663343-26641/root/chroot_tmpdir/scmroot/magicmirror'...
$ git fetch origin 31f1795f2ea4c9a73ea4cd167dd5bb07fb0b9605:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/magicmirror
 * [new ref]         31f1795f2ea4c9a73ea4cd167dd5bb07fb0b9605 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 31f1795 Update to 2.22.0; Fixes: RHBZ#2175461