$ git clone -n https://src.fedoraproject.org/rpms/rubygem-Ascii85.git /var/lib/mock/f40-build-2322438-58656/root/chroot_tmpdir/scmroot/rubygem-Ascii85
Cloning into '/var/lib/mock/f40-build-2322438-58656/root/chroot_tmpdir/scmroot/rubygem-Ascii85'...
$ git fetch origin f641f81695e2420e564a6044249dbb6f78de102e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-Ascii85
 * [new ref]         f641f81695e2420e564a6044249dbb6f78de102e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f641f81 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild