$ git clone -n https://src.fedoraproject.org/rpms/rubygem-ensure_valid_encoding.git /var/lib/mock/f39-build-1458245-33044/root/chroot_tmpdir/scmroot/rubygem-ensure_valid_encoding
Cloning into '/var/lib/mock/f39-build-1458245-33044/root/chroot_tmpdir/scmroot/rubygem-ensure_valid_encoding'...
$ git fetch origin 324865bd625a2bc66ae7518163afd89e27278ac9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-ensure_valid_encoding
 * [new ref]         324865bd625a2bc66ae7518163afd89e27278ac9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 324865b Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild