$ git clone -n https://src.fedoraproject.org/rpms/stringtemplate.git /var/lib/mock/f39-build-1491019-34514/root/chroot_tmpdir/scmroot/stringtemplate
Cloning into '/var/lib/mock/f39-build-1491019-34514/root/chroot_tmpdir/scmroot/stringtemplate'...
$ git fetch origin 24e891a954d14a7c107ccb1a5f255cbbb7faa20a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/stringtemplate
 * [new ref]         24e891a954d14a7c107ccb1a5f255cbbb7faa20a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 24e891a Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild