$ git clone -n https://src.fedoraproject.org/rpms/flat-remix-theme.git /var/lib/mock/f40-build-1996514-44026/root/chroot_tmpdir/scmroot/flat-remix-theme
Cloning into '/var/lib/mock/f40-build-1996514-44026/root/chroot_tmpdir/scmroot/flat-remix-theme'...
$ git fetch origin f8b02b165c5e55bc9eb63a0082f44eb8a78207a0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/flat-remix-theme
 * [new ref]         f8b02b165c5e55bc9eb63a0082f44eb8a78207a0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f8b02b1 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild