$ git clone -n https://src.fedoraproject.org/rpms/rubygem-hoe.git /var/lib/mock/f42-build-side-1-3582472-46885/root/chroot_tmpdir/scmroot/rubygem-hoe
Cloning into '/var/lib/mock/f42-build-side-1-3582472-46885/root/chroot_tmpdir/scmroot/rubygem-hoe'...
$ git fetch origin 72380a7e84b187700e8dcb82911018511df233d2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-hoe
 * [new ref]         72380a7e84b187700e8dcb82911018511df233d2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 72380a7 Upstream patch for rubygems 3.6.7 change wrt setting DEFAULT_SOURCE_DATE_EPOCH