$ git clone -n https://src.fedoraproject.org/rpms/magicmirror.git /var/lib/mock/f40-build-2264729-54569/root/chroot_tmpdir/scmroot/magicmirror
Cloning into '/var/lib/mock/f40-build-2264729-54569/root/chroot_tmpdir/scmroot/magicmirror'...
$ git fetch origin 0e1ba4aa87a45096be5488e14f416623fb458f8c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/magicmirror
 * [new ref]         0e1ba4aa87a45096be5488e14f416623fb458f8c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0e1ba4a Update to 2.26.0; Fixes: RHBZ#2241888