$ git clone -n https://src.fedoraproject.org/rpms/glibc.git /var/lib/mock/f39-build-1470304-33888/root/chroot_tmpdir/scmroot/glibc
Cloning into '/var/lib/mock/f39-build-1470304-33888/root/chroot_tmpdir/scmroot/glibc'...
$ git fetch origin 7dfdbab9b3f3be4a6fc4adabe0ea69a24bab9707:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/glibc
 * [new ref]         7dfdbab9b3f3be4a6fc4adabe0ea69a24bab9707 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7dfdbab Revert "Fix force-first handling in dlclose" (#2246048)