$ git clone -n https://src.fedoraproject.org/rpms/rubygem-activemodel-serializers-xml.git /var/lib/mock/f40-build-2384047-60487/root/chroot_tmpdir/scmroot/rubygem-activemodel-serializers-xml
Cloning into '/var/lib/mock/f40-build-2384047-60487/root/chroot_tmpdir/scmroot/rubygem-activemodel-serializers-xml'...
$ git fetch origin e6d5291fa0182b4433ed015c7753d4fa8197f488:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-activemodel-serializers-xml
 * [new ref]         e6d5291fa0182b4433ed015c7753d4fa8197f488 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e6d5291 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild