$ git clone -n https://src.fedoraproject.org/rpms/undbx.git /var/lib/mock/f40-build-2044117-48687/root/chroot_tmpdir/scmroot/undbx
Cloning into '/var/lib/mock/f40-build-2044117-48687/root/chroot_tmpdir/scmroot/undbx'...
$ git fetch origin f280dacce2c396208e580909e97b5c5aa0d5f276:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/undbx
 * [new ref]         f280dacce2c396208e580909e97b5c5aa0d5f276 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f280dac Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild