$ git clone -n https://src.fedoraproject.org/rpms/rubygem-sinatra.git /var/lib/mock/f42-build-3402212-45132/root/chroot_tmpdir/scmroot/rubygem-sinatra
Cloning into '/var/lib/mock/f42-build-3402212-45132/root/chroot_tmpdir/scmroot/rubygem-sinatra'...
$ git fetch origin 07b3727f68b538f8d103ec8bedc317baf27ec9f5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-sinatra
 * [new ref]         07b3727f68b538f8d103ec8bedc317baf27ec9f5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 07b3727 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild