$ git clone -n https://src.fedoraproject.org/rpms/rubygem-chake.git /var/lib/mock/f39-build-1458081-33035/root/chroot_tmpdir/scmroot/rubygem-chake
Cloning into '/var/lib/mock/f39-build-1458081-33035/root/chroot_tmpdir/scmroot/rubygem-chake'...
$ git fetch origin 3b986c2b1a40405ba0986de2a5a099c1705db3bd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-chake
 * [new ref]         3b986c2b1a40405ba0986de2a5a099c1705db3bd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3b986c2 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild