$ git clone -n https://src.fedoraproject.org/rpms/rubygem-RedCloth.git /var/lib/mock/f42-build-865207-172845/root/chroot_tmpdir/scmroot/rubygem-RedCloth
Cloning into '/var/lib/mock/f42-build-865207-172845/root/chroot_tmpdir/scmroot/rubygem-RedCloth'...
$ git fetch origin 64a9da86e608c52aa19cba3a028ceb3853e77583:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-RedCloth
 * [new ref]         64a9da86e608c52aa19cba3a028ceb3853e77583 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 64a9da8 Rebuilt for https://fedoraproject.org/wiki/Changes/Ruby_3.4