$ git clone -n https://src.fedoraproject.org/rpms/xbase.git /var/lib/mock/f39-build-1470229-33886/root/chroot_tmpdir/scmroot/xbase
Cloning into '/var/lib/mock/f39-build-1470229-33886/root/chroot_tmpdir/scmroot/xbase'...
$ git fetch origin ddadc5e8df2722de9b5c9455b0d1093aee5911f2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xbase
 * [new ref]         ddadc5e8df2722de9b5c9455b0d1093aee5911f2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ddadc5e Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild