$ git clone -n https://src.fedoraproject.org/rpms/magicmirror-module-onthisday.git /var/lib/mock/f39-build-1572561-37788/root/chroot_tmpdir/scmroot/magicmirror-module-onthisday
Cloning into '/var/lib/mock/f39-build-1572561-37788/root/chroot_tmpdir/scmroot/magicmirror-module-onthisday'...
$ git fetch origin fe32d45259751b429b43960a89771f0daf28cf3a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/magicmirror-module-onthisday
 * [new ref]         fe32d45259751b429b43960a89771f0daf28cf3a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fe32d45 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild