$ git clone -n https://src.fedoraproject.org/rpms/rubygem-webmock.git /var/lib/mock/f42-build-3494536-45873/root/chroot_tmpdir/scmroot/rubygem-webmock
Cloning into '/var/lib/mock/f42-build-3494536-45873/root/chroot_tmpdir/scmroot/rubygem-webmock'...
$ git fetch origin 8128d29ba599c11227bb15949632830c41d4339c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-webmock
 * [new ref]         8128d29ba599c11227bb15949632830c41d4339c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8128d29 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild