$ git clone -n https://src.fedoraproject.org/rpms/rubygem-webmock.git /var/lib/mock/f39-build-1934471-43117/root/chroot_tmpdir/scmroot/rubygem-webmock
Cloning into '/var/lib/mock/f39-build-1934471-43117/root/chroot_tmpdir/scmroot/rubygem-webmock'...
$ git fetch origin 559823a7633ac904e147ae8faddd3190a35f6656:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-webmock
 * [new ref]         559823a7633ac904e147ae8faddd3190a35f6656 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 559823a Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild