$ git clone -n https://src.fedoraproject.org/rpms/pg_activity.git /var/lib/mock/f39-build-1465848-33621/root/chroot_tmpdir/scmroot/pg_activity
Cloning into '/var/lib/mock/f39-build-1465848-33621/root/chroot_tmpdir/scmroot/pg_activity'...
$ git fetch origin b9bb776c928aca257da2b047b07ad2c4744b5d11:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pg_activity
 * [new ref]         b9bb776c928aca257da2b047b07ad2c4744b5d11 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b9bb776 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild