$ git clone -n https://src.fedoraproject.org/rpms/kdb.git /var/lib/mock/f42-build-side-1-3517618-46098/root/chroot_tmpdir/scmroot/kdb
Cloning into '/var/lib/mock/f42-build-side-1-3517618-46098/root/chroot_tmpdir/scmroot/kdb'...
$ git fetch origin 64178227636f1bf71e6fea6c7717a69a7069af67:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kdb
 * [new ref]         64178227636f1bf71e6fea6c7717a69a7069af67 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6417822 Fix build with ICU 76