$ git clone -n https://src.fedoraproject.org/rpms/megapixels.git /var/lib/mock/f38-build-713967-94622/root/chroot_tmpdir/scmroot/megapixels
Cloning into '/var/lib/mock/f38-build-713967-94622/root/chroot_tmpdir/scmroot/megapixels'...
$ git fetch origin 28dcc86cbd5f16f6c14d0812e07e5a8a7672d74b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/megapixels
 * [new ref]         28dcc86cbd5f16f6c14d0812e07e5a8a7672d74b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 28dcc86 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild